Titanium-boron additive alloys

Abstract

A new high concentration titanium-boron additive alloy for addition to molten metals is provided comprising about 60% to 78% titanium, about 1.3% to 4.5% boron and the balance iron with residual impurities in ordinary amounts. Aluminum, zirconium, silicon and manganese may be present in an amount up to about 20% so long as the ratio of titanium to boron remains in the range.

I claim: 
     
       1. A high concentration titanium-boron additive alloy for addition to liquid metal such as steel comprising about 60% to 78% titanium, about 1.3% to 4.5% boron and the balance iron with usual impurities in ordinary amounts. 
     
     
       2. A high concentration titanium-boron alloy as claimed in claim 1 having about 65% to 75% titanium, about 1.6% to 1.9% boron and the balance iron with usual impurities in ordinary amounts. 
     
     
       3. A high concentration titanium-boron alloy as claimed in claim 1 having about 68% to 72% titanium, about 1.6% to 1.9% boron and the balance iron with usual impurities in ordinary amounts. 
     
     
       4. A high concentration titanium-boron alloy as claimed in claim 1, or 2 or 3 having up to 20% of one or more of the elements zirconium, aluminum, silicon and manganese. 
     
     
       5. A high concentration titanium-boron alloy as claimed in claim 4 having a ratio of titanium to boron in the range 30/1 to 50/1 with the titanium content at approximately the titanium-boron eutectic. 
     
     
       6. A high concentration titanium-boron alloy as claimed in claim 4 having a ratio of titanium to boron of about 40/1 with the titanium content at approximately the titanium-iron eutectic. 
     
     
       7. A high concentration titanium-boron alloy as claimed in claim 1 or 2 or 3 having a ratio of titanium to boron in the range 30/1 to 50/1 with the titanium content at approximately the titanium-iron eutectic. 
     
     
       8. A high concentration titanium-boron alloy as claimed in claim 1 or 2 or 3 having a ratio of titanium to boron of about 40/1 with the titanium content at approximately the titanium iron eutectic. 
     
     
       9. A high concentration titanium-boron alloy as claimed in claim 1 or 2 or 3 in which the homogeneity of the composition is insured by rapid cooling and solidification of the alloy from the liquid to the solid state. 
     
     
       10. A high concentration titanium-boron alloy as claimed in claim 4 containing 3.5% to 7.5% aluminum and 1.0% to 3.0% vanadium.